Sensor, platform door, platform structure of railway station platform, camera hood, and sensor manufacturing method

Abstract

To provide a platform structure of a railway station platform capable of reducing occurrence of malfunction caused by insects such as a spider or arthropods entering into a sensor in the sensor with at least one of a light emitting part and a light receiving part.SOLUTION: A first region R1 where a repellent is applied to repel insects or arthropods is provided around a light receiving part 37b. The density of a repellent in an inner region R1a as a region of the light receiving part side of the first region R1 is higher than the density of a repellent in an outer region R1b as a region opposite to the light receiving part 37b side.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to sensors, home doors, home structures of platforms at railway stations, camera hoods, and methods for manufacturing sensors.

Background Art

[0002] In order to prevent passengers from falling from the platform at a railway station and contact between passengers and trains, it is becoming increasingly common to provide home doors on the part of the platform facing the track. As a technology related to home doors, the technology disclosed in Patent Document 1 can be cited.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Various sensors are provided on the platform of a railway station. As an example, there are sensors for detecting the entry of a train and sensors for avoiding the occurrence of a situation where a passenger or an object is pinched by the door when closing the door of the home door (hereinafter referred to as door pinching). FIG. 9 is a schematic view of a platform P of a railway station as seen from the direction of travel of a train C. Reference numeral 30B in FIG. 9 refers to a sensor provided on a roof RF covering the platform P for detecting the entry of the train C. Although detailed illustration is omitted in FIG. 9, the sensor 30B includes a light emitting unit that outputs light of a predetermined wavelength such as infrared light toward the train C that has entered the platform P, and a light receiving unit that receives the reflected light of the light by the train C. The sensor 30B detects the entry of the train C in response to the detection of the reflected light by the light receiving unit.

[0005] As a sensor for avoiding pinching of a door, in the case of a sliding home door having a pair of sliding doors, it is provided in a door pocket for storing one door, and includes a light emitting unit that outputs light of a predetermined wavelength such as infrared light, and the other door. And a light receiving unit provided in a door pocket for storing the door and receiving the light. In the process of transitioning the door of the home door from the open state to the closed state, if the light reception by the light receiving unit is interrupted, the occurrence of pinching the door is avoided by returning the door to the open state.

[0006] As shown in FIG. 9, it is common that a evacuation space ES is provided under the platform P in case a person falls onto the track. Moisture tends to accumulate in this evacuation space ES, and mold is likely to occur. When mold occurs in the evacuation space ES, it will attract arthropods such as mites that feed on this mold and spiders that prey on the mites, and these arthropods may crawl out onto the platform P. When these arthropods enter the light receiving unit or the light emitting unit of the sensor of the home door, the light reception by the light receiving unit may be interrupted and malfunction of the home door may occur. The same applies to the sensor 30B for detecting the entry of a train, that is, false detection may occur when arthropods enter the light receiving unit or the light emitting unit.

[0007] An object of the present disclosure is to provide a technique for reducing the occurrence of malfunction caused by arthropods such as spiders entering a sensor including at least one of a light emitting unit and a light receiving unit.

Means for Solving the Problems

[0008] In order to solve the above problems, a sensor according to a first aspect of the present disclosure includes a light receiving unit that receives light reflected by a person or an object, or light output from a light emitting unit, and has a first region coated with a repellent for repelling insects or arthropods around the light receiving unit. The density of the repellent on the light receiving unit side in the first region is higher than the density of the repellent on the side opposite to the light receiving unit side. According to the first aspect, since the density of the repellent in the region coated with the repellent is higher on the light receiving unit side, the repellent effect becomes higher as it goes from the outside of the region to the light receiving unit side, and it becomes easier to drive back insects or arthropods that have entered the region to the outside of the region. For this reason, it becomes easier to avoid the intrusion of insects or arthropods into the light receiving unit, and the occurrence of malfunction due to the intrusion of insects or arthropods into the light receiving unit is reduced.

[0009] Further, in order to solve the above problems, a sensor according to a second aspect of the present disclosure is characterized by having a second region having an antifungal action outside the first region. By providing the second region outside the first region, the generation of mold is prevented around the light receiving unit, the mites that feed on the mold are prevented from gathering around the light receiving unit, and the spiders that prey on the mites are also prevented from gathering around the light receiving unit.

[0010] Further, in order to solve the above problems, a sensor according to a third aspect of the present disclosure includes a light emitting unit that outputs light received by a light receiving unit, or light received by the light receiving unit after being reflected by a person or an object, and has a first region coated with a repellent for repelling insects or arthropods around the light emitting unit, and the density of the repellent on the light emitting unit side in the first region is higher than the density of the repellent on the side opposite to the light emitting unit side. According to the third aspect, since the density of the repellent in the region coated with the repellent is higher on the light emitting side, the repellent effect becomes higher as it goes from the outside of the region toward the light emitting unit side, and it becomes easier to drive back insects or arthropods that have entered the region to the outside of the region. Therefore, it becomes easier to avoid the intrusion of insects or arthropods into the light emitting unit, and the occurrence of malfunction due to the intrusion of insects or arthropods into the light emitting unit is reduced. In addition, the above-described second region may be provided in the sensor of the third aspect, and in this case, the same effect as the second aspect is achieved.

[0011] Further, in order to solve the above problems, a home door according to a fourth aspect of the present disclosure has a sensor according to any one of the first aspect, the second aspect, and the third aspect. According to the fourth aspect, the occurrence of malfunction due to the intrusion of insects or arthropods into the light receiving unit of the sensor in the home door is reduced.

[0012] Further, in order to solve the above problems, a home structure according to a fifth aspect of the present disclosure is a home structure of a platform at a railway station, and is a home structure in which a plurality of home doors according to the fourth aspect are installed. According to the fourth aspect, the occurrence of malfunction due to the intrusion of insects or arthropods into the light receiving unit of the sensor in the home door is reduced.

[0013] Also, in order to solve the above problems, a hood according to a sixth aspect of the present disclosure is a hood provided around an imaging lens of a camera, and has a first region on an opening surface of the hood, on which a repellent for repelling insects or arthropods is applied. The density of the repellent on the imaging lens side in the first region is higher than the density of the repellent on the side opposite to the imaging lens. According to the hood of the sixth aspect, it is possible to reduce the occurrence of image pickup failure caused by insects or arthropods entering the imaging field of view partitioned by the hood.

[0014] Also, in order to solve the above problems, a manufacturing method according to a seventh aspect of the present disclosure is a manufacturing method of a sensor including a light receiving unit that receives light reflected by a person or an object, or light output from a light emitting unit. A first region coated with a repellent for repelling insects or arthropods is provided around the light receiving unit, and the density of the repellent on the light receiving unit side in the first region is made higher than the density of the repellent on the side opposite to the light receiving unit side. In the sensor manufactured by the manufacturing method of the seventh aspect, the occurrence of malfunction caused by insects or arthropods entering the light receiving unit is reduced.

[0015] Also, in order to solve the above problems, a manufacturing method according to an eighth aspect of the present disclosure is a manufacturing method of a sensor including a light emitting unit that outputs light received by the light receiving unit, or light received by the light receiving unit through reflection by a person or an object. A first region coated with a repellent for repelling insects or arthropods is provided around the light emitting unit, and the density of the repellent on the light emitting unit side in the first region is made higher than the density of the repellent on the side opposite to the light emitting unit side. In the sensor manufactured by the manufacturing method of the eighth aspect, the occurrence of malfunction caused by insects or arthropods entering the light emitting unit is reduced.

Brief Description of Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0017] <A. Embodiment> The embodiments described below are subject to various technically preferable limitations. However, the embodiments of the present disclosure are not limited to the forms described below.

[0018] FIG. 1 is a plan view showing an example of the plan of the platform P of a railway station where a plurality of home doors 3A according to an embodiment of the present disclosure are installed. Each of the plurality of home doors 3A is installed at a position corresponding to the boarding and alighting opening E1 for passengers of the train C near the edge of the platform P.

[0019] FIG. 2 is a perspective view showing a configuration example of the home door 3A. The home door 3A is a double-opening sliding door, and includes a pair of movable doors 4 and 5, a door pocket 31 for storing the movable door 4, and a door pocket 32 for storing the movable door 5. The home door 3A is provided with a sensor 30A for preventing the above-described door pinching. As shown in FIG. 2, the sensor 30A in the present embodiment has four sets of a light emitting part 37a and a light receiving part 37b. The light emitting part 37a is provided in the door pocket 31 and emits light L1 having a predetermined wavelength such as infrared light. The light receiving part 37b is provided in the door pocket 32 and receives the light L1.

[0020] When a person or an object exists between the light emitting part 37a and the light receiving part 37b facing the light emitting part 37a, the light L1 is blocked by the person or the object, and the reception of the light L1 by the light receiving part 37b is interrupted. The sensor 30A detects the presence of a person or an object between the light emitting part 37a and the light receiving part 37b facing the light emitting part 37a due to the interruption of the reception of the light L1 by the light receiving part 37b. The sensor 30A in the present embodiment has four sets of the light emitting part 37a and the light receiving part 37b, but may have one to three sets or five or more sets of the light emitting part 37a and the light receiving part 37b.

[0021] As shown in the above-described FIG. 9, a retreat space ES is provided under the platform P when a person falls. As described above, when an arthropod such as a spider living in the retreat space ES crawls onto the platform P and enters the light receiving part 37b, a malfunction of the sensor 30A may occur. The home door 3A of the present embodiment has a mechanism for reducing the occurrence of the above-described malfunction, and the feature of the present disclosure appears in this point.

[0022] FIG. 3 is an enlarged view of the periphery of the light receiving part 37b in the home door 3A. The light receiving part 37b has a light receiving element 37b1 that receives the light L1 and a cover 37b2 that covers the light receiving surface of the light receiving element 37b1. The cover 37b2 is formed of, for example, transparent acrylic or the like and transmits the light L1. A fluorine coating is applied to the surface of the cover 37b2. The reason for applying the fluorine coating to the surface of the cover 37b2 is as follows.

[0023] The spider has hairs and claws at the tips of its legs and uses these hairs and claws to climb on smooth surfaces such as plastics. However, it is difficult for the spider to climb on surfaces with an inclination angle exceeding 55 degrees with respect to the horizontal plane and it cannot climb on vertical surfaces. However, when dirt adheres to the surface of the cover 37b2, the spider can find a foothold and can walk on the surface of the cover 37b2. The surface of the cover 37b2 with a fluorine coating becomes smoother, and in an experiment using the spider Pisaura mirabilis, it became difficult to climb when the inclination angle of the cover 37b2 with respect to the horizontal plane was around 45 degrees. That is, the reason for applying the fluorine coating to the surface of the cover 37b2 is to make it difficult for the spider to walk on the surface of the cover 37b2. In addition, by applying the fluorine coating to the surface of the cover 37b2, the effect of preventing dirt from sticking and facilitating cleaning is also achieved.

[0024] In the present embodiment, a first region R1 coated with a repellent for repelling insects or arthropods such as spiders (hereinafter referred to as "arthropods") is formed around the light receiving portion 37b, and a second region R2 having an antifungal action is provided outside the first region R1. By providing the second region R2, the generation of mold around the light receiving portion 37b is prevented, and mites that feed on the mold are prevented from gathering around the light receiving portion 37b. As a result, spiders that prey on the mites are also prevented from gathering around the light receiving portion 37b. Specific examples of the repellent include, for example, those containing a pyrethroid-based compound as an active ingredient. For the second region R2, a well-known photocatalyst-free catalyst such as an inorganic antibacterial agent in which an antibacterial metal such as silver, copper, or zinc is supported on various inorganic carriers may be applied. In the present embodiment, the first region R1 and the second region R2 are pre-formed at the time of factory shipment of the home door 3A.

[0025] As shown in FIG. 3, the first region R1 is divided into an inner region R1a, which is the region on the side of the light-receiving unit 37b, and an outer region R1b, which is on the side opposite to the light-receiving unit 37b, that is, the outer region when viewed from the light-receiving unit 37b. In the present embodiment, the density of the repellent in the inner region R1a is different from the density of the repellent in the outer region R1b, and the feature of the present disclosure appears in this regard. FIG. 4 is a diagram showing an example of the change in the density of the repellent in the first region R1. In the present embodiment, the first region R1 is formed such that the density V1 of the repellent applied to the inner region R1a is higher than the density V2 of the repellent applied to the outer region R1b. Specifically, the first region R1 is formed by uniformly applying the repellent to the entire first region R1, for example, by spray painting or the like, without distinguishing between the inner region R1a and the outer region R1b, and then reapplying the repellent only to the inner region R1a after the applied repellent has dried. Thus, the reason for forming the first region R1 such that the density V1 of the repellent applied to the inner region R1a is higher than the density V2 of the repellent applied to the outer region R1b is as follows.

[0026] The higher the density of the repellent, the higher the repellent effect of the repellent on the arthropod. Therefore, even if a spider crawls out from the retreat space provided below the platform P, climbs onto the door pocket 32, and enters the first region R1, the repellent effect of the repellent increases as it moves from the outside of the first region R1 toward the light-receiving unit 37b side. Thus, it becomes easier to drive the spider that has entered the first region R1 back outside the first region R1. Therefore, according to the present embodiment, it becomes easier to avoid the spider from entering the light-receiving unit 37b, and it becomes less likely that a malfunction of the sensor occurs due to the spider entering the light-receiving unit 37b.

[0027] Since the repellent effect of the repellent gradually decreases over time, for example, when performing maintenance inspection of the home door 3A, it is preferable to reproduce the first region R1 by applying the repellent in the same manner as during the manufacture of the home door 3A. Since the effect of the fluorine coating of the cover 37b2 also fades over time, the fluorine coating and the reproduction of the first region R1 may be performed in a set manner. Specifically, it is conceivable to perform the work in the following manner. Note that the frequency of reapplication of the repellent may be appropriately set according to the environment in which the home door 3A is installed (for example, whether it is exposed to wind and rain). When reproducing the first region R1 alone, the operations of step S2 and step S3 may be omitted. Step S1: Substrate treatment (cleaning) Step S2: Curing around the sensor Step S3: Fluorine coating on the sensor part Step S4: Curing of the sensor part Step S5: Application of repellent to the area around the sensor Step S6: Natural drying Step S7: Removal of curing Step S8: Completion

[0028] As described above, according to the present embodiment, in the sensor 30A that detects the presence of a person or an object between the light emitting unit 37a and the light receiving unit 37b when the light reception by the light receiving unit 37b that receives the light L1 emitted from the light emitting unit 37a is interrupted, it is possible to reduce the occurrence of malfunction caused by a spider entering the light receiving unit 37b. If the first region R1 is formed, it becomes difficult for a spider to enter the light receiving unit 37b, so the second region R2 may be omitted, and the fluorine coating of the cover 37b2 may also be omitted.

[0029] <B: Modification example> The above-described embodiment may be modified as follows. (1) In the above embodiment, the density of the repellent in the first region R1 changes discontinuously at the boundary between the inner region R1a and the outer region R1b, but as shown in FIG. 5, it may change continuously.

[0030] (2) In the above embodiment, the first region R1 and the second region R2 are formed so as to surround one light receiving part 37b. However, as shown in FIG. 6, the first region R1 and the second region R2 may be formed so as to surround a plurality of light receiving parts 37b.

[0031] (3) In the above embodiment, a platform on which a plurality of home doors according to an embodiment of the present disclosure are installed has been described. However, the home door may be manufactured or sold alone, and the sensor included in the home door may be manufactured or sold alone.

[0032] (4) In the above embodiment, the repellent is applied only once to the outer region R1b and twice to the inner region R1a, so that the density of the repellent in the inner region R1a is made higher than the density of the repellent in the outer region R1b. However, by applying a repellent with a high concentration to the inner region R1a and a repellent with a low concentration to the outer region R1b, the density of the repellent in the inner region R1a may be made higher than the density of the repellent in the outer region R1b. Further, although the first region in the above embodiment is divided into two regions, an inner region R1a and an outer region R1b, the first region R1 may be divided into three or more regions in the direction from the light receiving part 37b toward the outside of the first region R1. In short, as long as the density of the repellent on the light receiving part side in the first region is higher than the density of the repellent on the side opposite to the light receiving part side, the specific generation method of the first region does not matter.

[0033] (5) In the above embodiment, the first region R1 is provided around the light receiving part 37b. However, the first region R1 may be provided around the light emitting part 37a. This is because when an arthropod enters the light emitting part 37a, the light L1 output from the light emitting part 37a is blocked by the body of the arthropod, and the light receiving of the light L1 by the light receiving part 37b may be interrupted. Further, the first region R1 may be provided around each of the light emitting part 37a and the light receiving part 37b.

[0034] (6) As shown in Fig. 7(A), a third region R3 coated with a repellent may be provided along the alignment of the platform doors 3A between the track-side end of the platform P and the platform doors 3A. Also, as shown in Fig. 7(B), a third region R3 coated with a repellent may be provided on the platform P so as to surround the periphery of a plurality of platform doors 3A. By providing the third region R3 on the platform P as shown in Fig. 7(A) or Fig. 7(B), it is possible to prevent arthropods that have crawled out onto the platform P from the evacuation space ES from approaching the platform doors 3A. Consequently, it is also possible to prevent a spider's web from being formed in the third region where the platform doors 3A are stored.

[0035] (7) The light receiving part 37b in the above embodiment receives the light L1 output from the light emitting part 37a, but it may also be a camera that performs imaging by receiving reflected light from a person or an object. When the light receiving part 37b is a camera, as shown in Fig. 8, a first region R1 may be formed by applying a repellent to the opening surface of a hood FD provided around the imaging lens of the camera. Also, the hood FD with the first region R1 formed on the opening surface may be manufactured or sold as a single unit as a replacement part for the camera.

[0036] (8) In the above embodiment, an application example of the present disclosure to a sensor included in a platform door installed on a platform of a railway station has been described, but the present disclosure may also be applied to a sensor for detecting the entry of a train onto the platform. As described above, as an example of a sensor for detecting the entry of a train onto the platform, there is a sensor including a light emitting part that outputs light toward the train and a light receiving part that receives the reflected light of the light by the train. When applying the present disclosure to the sensor, a first region coated with a repellent for repelling insects or arthropods may be provided around the light receiving part, and the density of the repellent on the light receiving part side in the first region may be made higher than the density of the repellent on the side opposite to the light receiving part side. Also, as long as it is a sensor including a light emitting part and a light receiving part, for example, the present disclosure can also be applied to a human presence sensor (or surveillance camera) installed in a factory, warehouse, commercial facility, or house.

[0037] (9) In the above-described embodiment, the case where the first region coated with the repellent is formed around the light-receiving unit 37b has been described. However, the region (first region) coated with the repellent for repelling arthropods may be set to include the inner surfaces of the door pockets 31 and 32 that extend around the light-receiving unit. In this case, it is possible to restrict arthropods from entering the door pockets 31 and 32. Also in this case, the density of the repellent on the light-receiving unit side is set higher than the density of the repellent on the side opposite to the light-receiving unit side (the side away from the light-receiving unit). Note that the repellent on the inner surfaces of the door pockets 31 and 32 may be applied during the manufacture of the home door or after the home door is installed, on the inner surfaces. Further, the application to the inner surfaces of the door pockets 31 and 32 may be performed by removing the surface cover or the like of the home door, spraying from the outside of the home door toward the inner surfaces, or using a nozzle that reaches the inner surfaces. Furthermore, when considering aging deterioration or the like, as maintenance after the home door is installed, the application of the repellent to the inner surfaces may be repeated each time maintenance is performed.

Explanation of Signs

[0038] 3A... Home door, 4, 5... Movable doors, 31, 32... Door pockets, 30A... Sensor, 37a... Light-emitting unit, 37b... Light-receiving unit, R1... First region, R1a... Inner region, R1b... Outer region, R2... Second region.

Claims

1. A light receiving unit that receives light reflected by a person or an object, or light output from a light emitting unit. A first region coated with a repellent for repelling insects or arthropods is provided around the light receiving unit. The density of the repellent on the light receiving unit side in the first region is higher than the density of the repellent on the side opposite to the light receiving unit side. A sensor characterized by the above.

2. The sensor according to claim 1, further comprising a second region having an antifungal action outside the first region.

3. A light emitting unit that outputs light received by the light receiving unit, or light received by the light receiving unit through reflection by a person or an object. A first region coated with a repellent for repelling insects or arthropods is provided around the light emitting unit. The density of the repellent on the light emitting unit side in the first region is higher than the density of the repellent on the side opposite to the light emitting unit side. A sensor characterized by the above.

4. A home door having the sensor according to any one of claims 1 to 3.

5. A platform home structure at a railway station, A home structure in which a plurality of the home doors according to claim 4 are installed.

6. A hood provided around an imaging lens of a camera, The opening surface of the hood has a first region coated with a repellent for repelling arthropods. The density of the repellent on the imaging lens side in the first region is higher than the density of the repellent on the side opposite to the imaging lens. A hood characterized by the above.

7. A method for manufacturing a sensor including a light receiving unit that receives light reflected by a person or an object, or light output from a light emitting unit, A first region coated with a repellent for repelling insects or arthropods is provided around the light receiving unit. The density of the repellent on the light receiving unit side in the first region is made higher than the density of the repellent on the side opposite to the light receiving unit side. A method for manufacturing a sensor characterized by the above.

8. A method for manufacturing a sensor including a light emitting unit that outputs light received by the light receiving unit, or light received by the light receiving unit through reflection by a person or an object. A first region coated with a repellent for repelling insects or arthropods is provided around the light emitting unit. The density of the repellent on the light emitting unit side in the first region is made higher than the density of the repellent on the side opposite to the light emitting unit side. A method for manufacturing a sensor characterized by the above.

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